Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32530
Title: Characterization of the orientation structure and distribution in rolled polypropylene
Authors: Lee, WB 
Wu, SZ
Song, MS
Keywords: Orientation distribution
Orientation structure
Polypropylene
Issue Date: 1996
Source: Journal of materials engineering and performance, 1996, v. 5, no. 5, p. 637-645 How to cite?
Journal: Journal of Materials Engineering and Performance 
Abstract: The polymer orientation structure in rolled polypropylene sheets was studied by polarized-light microscopy, scanning electron microscopy, and wide-angle x-ray diffraction. The initial spherulites became deformed to a pancake shape as rolling deformation proceeded and became more perfectly aligned as the rolling procedure continued. Most polymer crystallites were oriented with their b-axis nearly perpendicular to the rolling direction, as shown by x-ray pole figures. Even-order 〈Pn(cosX)〉c coefficients of the Legendre polynomial series (n = 2 to 10) describing the c-axis or orientation distribution of the molecular chains were determined from measurements of polar angle scan using the transmission technique. The 〈Pn〉c (n = 2 to 10) curves calculated from the pseudoaffine deformation theory agreed with the experimental data.
URI: http://hdl.handle.net/10397/32530
ISSN: 1059-9495
DOI: 10.1007/BF02646094
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